From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Cameron Subject: Re: [PATCH v5 03/11] staging: iio: ad7780: add gain reading to ad778x Date: Sat, 16 Mar 2019 17:54:23 +0000 Message-ID: <20190316175423.26481b43@archlinux> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: Renato Lui Geh Cc: mark.rutland@arm.com, devel@driverdev.osuosl.org, lars@metafoo.de, pmeerw@pmeerw.net, Michael.Hennerich@analog.com, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, kernel-usp@googlegroups.com, robh+dt@kernel.org, giuliano.belinassi@usp.br, stefan.popa@analog.com, knaack.h@gmx.de, alexandru.Ardelean@analog.com List-Id: devicetree@vger.kernel.org On Fri, 15 Mar 2019 23:13:13 -0300 Renato Lui Geh wrote: > This patch adds a new functionality of reading gain values from the > ad778x chips. This value is stored in the chip's state struct and is > updated whenever a read or write call is performed on the driver. > > Signed-off-by: Renato Lui Geh Applied, thanks > --- > drivers/staging/iio/adc/ad7780.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c > index f4cd7bc3e02f..fbcc0d3345ca 100644 > --- a/drivers/staging/iio/adc/ad7780.c > +++ b/drivers/staging/iio/adc/ad7780.c > @@ -42,6 +42,8 @@ > #define AD7780_GAIN_MIDPOINT 64 > #define AD7780_FILTER_MIDPOINT 13350 > > +static const unsigned int ad778x_gain[2] = { 1, 128 }; > + > struct ad7780_chip_info { > struct iio_chan_spec channel; > unsigned int pattern_mask; > @@ -179,6 +181,9 @@ static int ad7780_postprocess_sample(struct ad_sigma_delta *sigma_delta, > ((raw_sample & chip_info->pattern_mask) != chip_info->pattern)) > return -EIO; > > + if (chip_info->is_ad778x) > + st->gain = ad778x_gain[raw_sample & AD7780_GAIN]; > + > return 0; > } >